期刊
CORROSION SCIENCE
卷 183, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109331
关键词
C; C composites; ZrB2; Oxidation resistance; Volume expansion
资金
- National Natural Science Foundation of China [51872239, 52002321]
- Creative Research Foundation of Science and Technology on Thermostructural Composite Materials Laboratory [5050200015]
- Fundamental Research Funds for the Central Universities [G2020KY05125]
The dense double layer ZrB2-SiC-Si/SiC-Si coating effectively protects the C/C substrate from oxidation, attributed to the high content of ZrB2 and the mechanism of inhibiting the evaporation of silicate glass.
A dense double layer ZrB2-SiC-Si/SiC-Si coating with high content of ZrB2 was designed and fabricated by dipping-carbonization joint gaseous silicon infiltration. This coating can protect C/C substrate from oxidation in air at 1773 K for 500 h with a weight gain of 1.14 %. Such good oxidation protective performance was ascribed to the dense compound silicate oxide layer accompanied by ZrSiO4/ZrO2 pinning phases and compressive stress field around ZrB2 particles during oxidation. Besides, introducing abundant ZrB2 phase could inhibit the evaporation of silicate glass at 1973 K, which could protect C/C composites for 78 h with a weight loss of 1.16 %.
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